Tetsuya visits his relatives, the Matsushima family. He has long been attracted to his aunt, Yurie, but has struggled to suppress his feelings. One day, he accidentally catches her masturbating. She is silently thrusting her fingers into her pussy, writhing in pleasure while trying hard to stay quiet. Unable to control himself any longer, Tetsuya approaches Yurie as she lies on the sofa. He reaches under her underwear and gently begins touching her body.